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Analytical cell

a technology of analytic cells and electrodes, applied in the field of analytic cells, can solve the problems of difficult to accurately observe the reaction of the electrodes of the analysis subjects, and achieve the effects of easy and efficient production process, high accuracy analysis, and simple production process

Inactive Publication Date: 2016-11-15
HONDA MOTOR CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Benefits of technology

[0010]A principal object of the present invention is to provide an analytical cell capable of inhibiting or suppressing side reactions on a negative electrode collector and a positive electrode collector, thereby highly accurately analyzing electrode reactions of a negative electrode active material and a positive electrode active material.
[0019]In the analytical cell of the present invention, the isolation membrane for avoiding contact with the electrolytic solution is formed on at least one of the negative electrode collector and the positive electrode collector in the overlapping portion. Therefore, side reactions, which are different from the electrode reactions of the negative electrode active material and the positive electrode active material, can be suppressed on the negative electrode collector and the positive electrode collector. Consequently, the electrode reactions of the analysis subjects can be highly accurately analyzed by observing the negative electrode active material, the positive electrode active material, or the like while transmitting the electron beam through the analytical cell.
[0020]In the above analytical cell, each of the negative electrode collector and the positive electrode collector may have a layer structure with one surface contacting the first holder and the other surface having the isolation membrane. In this case, in production of the analytical cell, the negative electrode collector and the positive electrode collector may be formed only on the first holder. The one surface of the negative electrode collector and the one surface of the positive electrode collector are in contact with the first holder (e.g., the transmission membrane) and are not in contact with the electrolytic solution. Therefore, the contact of the negative electrode collector and the positive electrode collector with the electrolytic solution can be avoided by forming the isolation membranes only on the other surfaces. Consequently, the analytical cell can be easily and efficiently obtained by a simple production process.
[0021]In the above analytical cell, the negative electrode collector may have a layer structure with one surface contacting the first holder and the other surface having the isolation membrane, and the positive electrode collector may have a layer structure with one surface contacting the second holder and the other surface having the isolation membrane. In this case, the negative electrode active material and the positive electrode active material are disposed on each of the first holder and the second holder. Therefore, even when the negative electrode active material and the positive electrode active material are disposed in a small space, the negative electrode active material and the positive electrode active material are not arranged excessively close to each other and are not in contact with each other. Consequently, the negative electrode active material and the positive electrode active material can be effectively prevented from short-circuiting.
[0022]When the negative electrode active material, the positive electrode active material, and the like in the analytical cell are observed, the electron beam needs to be transmitted through the observation window. In this process, the electrolytic solution may inhibit the transmission of the electron beam. Therefore, it is preferred that the thickness of the electrolytic solution layer formed between the transmission membranes in the observation window is reduced, and the electron beam transmission distance in the electrolytic solution is shortened, to improve the observation accuracy. Thus, in the above analytical cell, it is preferred that the isolation membrane has an electron beam permeability (electron beam transparency) and extends from at least one of the negative electrode collector and the positive electrode collector in such a manner that the isolation membrane is interposed between the transmission membrane and at least one of the negative electrode active material and the positive electrode active material in the observation window.
[0023]In this analytical cell, as described above, the electron beam-permeable isolation membrane is interposed between the transmission membrane and at least one of the negative electrode active material and the positive electrode active material in the observation window, whereby the electron beam transmission distance in the electrolytic solution can be shortened. Consequently, the electrode reactions of the negative electrode active material and the positive electrode active material, etc. can be more highly accurately analyzed.

Problems solved by technology

In this case, it is difficult to accurately observe the electrode reactions of the analysis subjects.

Method used

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first embodiment

[0065]An analytical cell 10 according to a first embodiment will be described below with reference to FIGS. 1 to 4. FIG. 1 is an overall schematic perspective view of the analytical cell 10. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1 in the direction of the arrows. FIG. 3 is a plan view of a transmission membrane (electron beam permeable membrane or electron beam transparent membrane) 14 side of a first holder 12 in the analytical cell 10. FIG. 4 is a plan view of a transmission membrane (electron beam permeable membrane or electron beam transparent membrane) 18 side of a second holder 16 in the analytical cell 10. To facilitate understanding, the X-axis, Y-axis, and Z-axis directions shown in FIGS. 1 to 4 are defined as the width, depth, and height directions respectively in the following description. In addition, in the X-axis, Y-axis, and Z-axis directions, the tip of the arrow is defined as one end, and the base end of the arrow is defined as the other...

second embodiment

[0110]An analytical cell 88 according to a second embodiment will be described below with reference to FIG. 33. FIG. 33 is a cross-sectional view of the analytical cell 88 taken in the same direction as FIG. 2. The components in FIG. 33, equal or similar in functions and effects to those in FIGS. 1 to 32C, are denoted by the same reference numerals, and detailed explanations thereof are omitted.

[0111]The analytical cell 88 contains isolation membranes 90, 92 instead of the isolation membranes 46, 48 in the analytical cell 10. The isolation membranes 90, 92 contain a substance having electrically insulating and electron beam permeable properties. Preferred examples of such substances include silicon nitride.

[0112]The isolation membranes 90, 92 are different from the isolation membranes 46, 48 in that the other end of the isolation membrane 90 and the one end of the isolation membrane 92 reach the inside of the observation window 36. Thus, each of the isolation membranes 90, 92 is int...

third embodiment

[0115]An analytical cell 94 according to a third embodiment will be described below with reference to FIGS. 34 to 37. FIG. 34 is an overall schematic perspective view of the analytical cell 94. FIG. 35 is a cross-sectional view of the analytical cell 94 of FIG. 34 taken along the line XXXV-XXXV in the direction of the arrows. FIG. 36 is a plan view of a transmission membrane 14 side of a first holder 96 in the analytical cell 94. FIG. 37 is a plan view of a transmission membrane 18 side of a second holder 98 in the analytical cell 94. The components in FIGS. 34 to 37, equal or similar in functions and effects to those in FIGS. 1 to 33, are denoted by the same reference numerals, and detailed explanations thereof are omitted.

[0116]The analytical cell 94 contains the first holder 96 and the second holder 98 instead of the first holder 12 and the second holder 16 in the analytical cell 10. The first holder 96 contains a substrate 100 instead of the substrate 24, and the second holder 9...

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Abstract

An analytical cell includes first and second holders. The first and second holders each contain a substrate having a through-hole and a transmission membrane with an electron beam permeability so as to cover the through-hole. The first and second holders are stacked to form an overlapping portion such that the transmission membranes face each other. The through-holes face each other across the transmission membranes to form an observation window. Negative and positive electrode active materials are separated from each other and contact the electrolytic solution in the observation window. The negative and positive electrode active materials are electrically connected to negative and positive electrode collectors, respectively, in the overlapping portion. At least one of the negative and positive electrode collectors has an electrically insulating isolation membrane for avoiding contact with the electrolytic solution.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2014-080427 filed on Apr. 9, 2014, the contents of which are incorporated herein by reference.BACKGROUND OF THE INVENTION[0002]Field of the Invention[0003]The present invention relates to an analytical cell suitable for use, e.g., in an electrode reaction analysis in an analytical equipment.[0004]Description of the Related Art[0005]As is well known, in an electric cell, a negative electrode active material and a positive electrode active material undergo electrode reactions in the charge-discharge process. In recent years, the electrode reactions have been analyzed during the charge-discharge process using analytical equipment. For example, an analytical cell that can be observed by a transmission electron microscope (TEM) has been proposed in In-situ Electron Microscopy of Electrical Energy Storage Materials [online], 2014, Retrieved on ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H01J37/20
CPCH01J37/20H01J2237/2007Y02P70/50
Inventor KURIYAMA, NARIAKIFUJIWARA, YOSHIYA
Owner HONDA MOTOR CO LTD
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